6616421412 has 24 divisors (see below), whose sum is σ = 15814862112. Its totient is φ = 2151681600.

The previous prime is 6616421411. The next prime is 6616421417. The reversal of 6616421412 is 2141246166.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6616421411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6723514 + ... + 6724497.

It is an arithmetic number, because the mean of its divisors is an integer number (658952588).

Almost surely, 2^6616421412 is an apocalyptic number.

It is an amenable number.

6616421412 is an abundant number, since it is smaller than the sum of its proper divisors (9198440700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6616421412 is a wasteful number, since it uses less digits than its factorization.

6616421412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13448059 (or 13448057 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 6616421412 is about 81341.3880629044. The cubic root of 6616421412 is about 1877.3318696514.

Adding to 6616421412 its reverse (2141246166), we get a palindrome (8757667578).

The spelling of 6616421412 in words is "six billion, six hundred sixteen million, four hundred twenty-one thousand, four hundred twelve".